High-energy electron irradiation study of relaxor ferroelectric Pb(Mg1/3Nb2/3)O3 and Pb1−xLax[Mg(1+x)/3Nb(2−x)/3]O3 by transmission electron microscopy
2002 ◽
Vol 17
(10)
◽
pp. 2615-2620
◽
Keyword(s):
The electron irradiation sensitivities of Pb(Mg1/3Nb2/3)O3 (PMN) and Pb1−xLax[Mg(1+x)/3Nb(2−x)/3]O3 (PLMN) ceramics were investigated by transmission electron microscopy. Nanoscale Pb particles formed in these materials under electron beam radiation. It was found that these fine Pb particles generally had a preferred crystallographic orientation relationship with the PMN/PLMN host and always existed at positions slightly rich in Mg2+. A preliminary mechanism involving defect chemistry reactions is proposed to interpret this unusual Pb precipitation. Possible limitations to the practical applications of these materials are discussed.
1994 ◽
Vol 138
(1-4)
◽
pp. 48-54
◽
1993 ◽
Vol 132
(1-2)
◽
pp. 331-334
◽
1991 ◽
Vol 10
(3)
◽
pp. 181-186
◽
1995 ◽
Vol 150
◽
pp. 743-748
◽